Novel sound absorption material and structure for vehicle and manufacturing method thereof

Abstract

The invention provides a novel sound absorption material and structure for a vehicle. The material is of two layers, wherein needle-punched nonwoven materials and hollow short fiber are located in one layer, and hydrogenated carboxyl nitrile rubber and hollow polyester staple fiber composite materials are arranged in the other layer. A manufacturing method of the novel sound absorption material and structure comprises the steps that an HXNBR base body is open-milled in a two-roller open mill to form a film, the weighed hollow polyester staple fiber is added to the film for several times, mixing is carried out, and an HXNBR-hollow polyester staple fiber mixed body is obtained; the evenly-mixed HXNBR-hollow polyester staple fiber mixed body is placed in a specific mold for compression molding on a press vulcanizer; after compression molding is finished and the molded body is taken out, the needle-punched nonwoven materials are placed into the HXNBR-hollow polyester staple fiber composite material, cooling is carried out, and then the novel sound absorption material and structure for the vehicle are obtained. According to the sound absorption material and structure for the vehicle, the manufacturing method is easy to implement, the materials are light and thin, the performance is excellent, the material sound absorption performance can be changed based on different using methods so as to achieve different application, and the thickness and performance of the manufactured material can be adjusted according to actual requirements.

Description

technical field [0001] The invention belongs to the fields of sound-absorbing material and its preparation, and vehicle application engineering, and in particular relates to a novel vehicle-used sound-absorbing material and structure and a preparation method thereof. Background technique [0002] With the improvement of living standards, people's requirements for the environment are getting higher and higher, and people pay more and more attention to the surrounding noise. However, in the existing noise-reducing and sound-absorbing materials, the application frequency range is relatively single. For example, if you want to have a better sound absorption effect in the middle and high frequency bands, the sound absorption effect in the middle and low frequency bands is poor, or vice versa. Moreover, among the existing materials, it is easy to obtain better sound absorption effect in the middle and high frequency bands, but to obtain better sound absorption effect in the middle...

AI Technical Summary

Problems solved by technology

However, in the existing noise-reducing and sound-absorbing materials, the application frequency range is relatively single. For example, if you want to have a better sound absorption effect in the middle and high frequency bands, the sound absorption effect in the middle and low frequency bands is poor, or vice versa.

Moreover, among the existing materials, it is easy to obtain better sound absorption effect in the middle and high frequency bands, but to obtain better sound absorption effect in the middle and low frequencies often requires more complicated measures or manufacturing techniques to achieve.

Moreover, in order to obtain a better sound absorption effect in the middle and low frequencies, the materials are often very thick, the structure is complex, or the production process is difficult to master.

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